old-roraccounting/app/controllers/application_controller.rb

class ApplicationController < ActionController::API
  include Response
  include ActionView::Layouts

  include ActionController::HttpAuthentication::Basic::ControllerMethods
  http_basic_authenticate_with name: ENV['BASIC_AUTH_USERNAME'],
                               password: ENV['BASIC_AUTH_PASSWORD']

  def frontend_index_html
    render file: 'protected_public/index.html'
  end
end